Hoffman, K. Douglas
Essentials of services marketing
Harcourt College Publishers, 2002
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Still, Richard R.
Sales management decisions, strategies and cases
Prentice-Hall, 1988
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Hoffman, K. Douglas
Services marketing: concepts, strategies, and​ cases
Cengage Learning, 2017
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Still, Richard R.
Essentials of marketing
Prentice-Hall, 1966
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McDaniel, Carl
Marketing essentials
South Western Cengage Learning, 2012
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